Controller for a machine tool



FIG. 1 is a front elevational view of a controller for a machine tool, embodying our new design.

FIG. 2 is a top plan view thereof.

FIG. 3 is a left side elevational view thereof.

FIG. 4 is a right side elevational view thereof.

FIG. 5 is a rear elevational view thereof.

FIG. 6 is a bottom plan view thereof.

The broken lines represent a mounting bracket to show environment and are not part of the design. 

The ornamental design for a controller for a machine tool, as shown and described. 